Tractor mounted disk harrow



Sept. 1952 J. A. LOVE 2,609,647

TRACTOR MOUNTED DISK HARROW Filed se t 22, 1947 2 SH1;3ETS'SHEET 1 50 20 ZZ 5 /z /4 /0 T [/5 5 f 55 fig r /4 INVENTOR- JABEZ 4. 101 5 Sept. 9, 1952 J, A, LOVE 2,609,647

TRACTOR MOUNTED DISK HARROW Filed Sept. 22, 1947 2 swam-4mm 2 IN V EN TOR.

L/d EZfl. ZOVE.

MYW

atented Sept. 9, i952 This invention relates to improvements in disk harrows of the lift-up type whichare adapted to be used with a tractor having a power-operated lift-hitchmechanism, and particularly a hitch mechanism of the type having threeconnections spac'edfv'ertically and. transversely to accommotype having a main frame and a plurality of disk gangs, each including a frame, with 'novel means for connecting said gangs to said frame in selected adjustment for desired ground-working action.

A further object is to provide a harrow of this type having a, main frame and a plurality of disk gangs, each including a frame which is connected to the'main frame above the disk blades of each gang, withmeansfor restraining vertical tilting of thedisk gangs incident to ground working action of the harrow.

A further object is'to provide a harrow of the lifttype', which has a rigid frame of simple sturdy construction connected to the upper portions of rigid sub-frames forming a part of each of the plurality-of disk gangs in such a manner as to transmit draft stresses from a tractor to the disk blades of the gangs below the frame without damage to either the frames or the disk gangs and without disturbance of the desired setting,

of the gangs.

Other objects will be apparent from the followa $609,647 Y N we V 'rn io'roit MOUNTED mfs g mes Jabez A. Love, Silver Creek Townshi v Cass County, Mich. I

Application September 22, 1947, seria fv iwastio f i 3 Claims. (01.55-83) Fig. 4 is a fragmentary top plan view of a harrow having a modified construction 'of means foradjusting the setting of the disk gangs. I

Fig. 5 is a fragmentary side view of a portion of theharrow illustrating one former means for Referring to the drawings which illustrate the preferred embodiment of the invention, and particularly to Figs. 1 to 3 thereof, the numeral HI designates a rigid main frame which is preferably constructed iromia, rigid I'front bar 12, a rigid rear bar' l4, rigid sidebarsflfi andrigid intermediate .bars lg,lwhferein'the opposite ends of the bars 16 and 1852.11; bolted, welded or otherwise fixedly secured to the frontframemember land the rear framemember Minsuch' a'manner as to provide a strong, sturdy, simple, substantially fiatframe member or unit. 7

Theframe I0 isprovided at its'front central portion with a superstructure 20 which includes a pair of rigid members 22, each rigidly secured to the front frame member 12 in spaced relation to the center thereof and inclining upwardly tov terminatein'upper portions 24 fixed1y secured together by a bolt =2 6 extending therethrough and also serving to-connect the upper ends cf a pair of rigid members 28 whichjdiverge rearwardly.

outwardly and are secured tofthe frame :members l8 byweld-joints or other means. The members 22 and 28 cooperate to provide arigid structure in which a bolt-'30is removably mounted preferab1y at the u pe ends, ofj the parts'24. The

bolt 30 is adapted forconnection; of one member of a power -hitch mechanism (not :shown). Brackets 3 2 are fixedly connectedto thefront frame'member l2 o'n-0pposite sides of the center thereof and each fixedly mounts a pin 34. Thepins .34 areadapted for connection of two other parts of a power hitch mechanism (not shown) thereto. Thus it will be apparent that the combination of the'superstructure with its bolt'30 and the brackets 32 with-their pins 34 provide three points 'of connection for a power hitch, which'points ofconnection are spaced apart vertically and transversely; In' hitch devices of this character two arms which are connected to the pin-s 34'are in tension when the device is used to pull'anfimple'ment, and the third arm or link which is connected t0 the bolt-30 is in compression; Thus the'angle or working attitude of the implement may be controlled "while t he imple-. ment is drawn for the purposeof working the round. v

For the purpose of illustration, the harrow has been shown herein as a disk harrow of the tandem type. It will be understood, however, that this illustration is illustrative only and that the invention may be embodied in a single action harrow as well as in the tandem type; In

the tandem typeillustrated, two front disk gangs 4B and two rear diskgangs '42 are provided.

. Eachof the disk gangs comprises a plurality of disk'blades 44 mounted upon a common shaft or axle 45 in concentric relation and in predetermined spacing, Suitable spacers 48 are interposedbetween the disk blades of 'each gang and serve to maintainthe desired spacing of the disk blades. Each disk gang includes an outer bearing 50 and an inner bearing 52. These bearings have sockets 54 projecting upwardly therefrom.

3 A rigid gang frame is provided which is of inverted U-shaped form having an upper horizontal frame part 56 and a pair of rigid depending leg portions 58 at its opposite ends. The leg portions 58 fit into the sockets 54 of the bearings 5i) and 52'. The length of the horizontal portion 55 of each frame is preferably greater than the spacing between adjacent'frame members l6 and I8 of the main frame. One of the ends of each disk gang frame is bolted or otherwise secured as at 60 to the outer member Id;

and I8 to maintain the depending arms 58 of I the disk gang frames in upright position. In the tandem type of harrow here illustrated, the front disk gangs 40 are secured to the frame members I6 and I8 adjacent their forward ends, and the rear disk gangs, 42 are secured to the frame members I6 and I8 adjacent their rear ends with sufiicient clearance between the gangs to accommodate adjustment of the gangs to con trol the angle or setting of the disk blades with reference to the line of draft of the harrow. This adjustment is permitted by providing one or both of theframe members I 6, I8 with a series of spaced openings '64 at which the bolt or other connections 60, 62 between the main frame and the disk frame are effected.

It will be apparent that this construction of disk harrow is very simple in construction and that its simplicity reduces the number of parts to a minimum so that both the .cost and the weight of the implement is similarly held at a minimum. In, the event it is found desirable toadd weight to secure the proper operation of the implement, this can be done. in any desired manner by detachably connecting weight members upon the implement main frame ID or by providing a container or box upon the main frame within which weight elements may be held. Consequently, all of the advantages of light weight are secured without objection because the advantages of greater weight can be secured by adding weight to the harrow, as explained.

The provision of the main frame If] in substantially fiat form as shown facilitates the compact arrangement of the harrows in a knockdown form preparatory toshipping in such cases where the disk gangs are disconnected from the main frame for shipping purposes. The rigidity, of the removable connection of each disk gang with the main frame at points 69 and 62 accommodates the application of draft force at the level of the frame and. its transmission through the disk gang frames to the disk blades without injury to the harrow.

In the event it is desired to reinforce the disk gangs against vertical tilting of the frame incidentto the transmission of the draft pull from the main frame through the disk gang frame to the disk blades, the construction as illustrated in Fig. 5 may be employed. In this construction one of the main frame members, preferably the outer member 16, to which the disk gang frame is bolted at 59, has a substantially V-shaped rigid bracket secured thereto. This bracket preferably comprises a rigid bar whose ends 66 extend -in coplanar relation and are welded, bolted or otherwise secured rigidly tothe main frame member in face engagement therewith as shown. Downwardly converging portions 68 extend from the terminal portions 66 and are joined together by a central horizontal part III spaced. below the main frame. This central member It has an aperture 12 therein through which the leg 58 of the disk gang extends with sufficient freedom to permit angular adjustment of the disk gang to desired setting but sufficiently snug to prevent any substantial vertical tilting of the arm 58' incident to stress applied thereto during the use of the implement. It will'be apparent that a similar construction may be applied at both ends of the frame of each disk gang if desired, but this requires adjustable mounting of the reinforcing bracket at one end of each disk gang in order to accommodate angular adjustment on a change of setting of the disk gangs. Y

A second form. or construction of the harrow which serves the same purpose of preventing vertical tilting of the disk gang frames incident to the pull exerted inthe use of the harrow is illustrated in Fig. 6, wherein the horizontal part 56 of each disk gang frame is provided, at least at one end thereof, with rigid laterally extending wings i i which are adapted to underlie the adjacentone of the frame members I6, I8. Braces 76 are anchored by welding or other means to the outer end portions of the wings l4 and converge downwardly and inwardly to be welded or otherwise secured to the adjacent depending leg 58 of the disk gang frame in spaced relation be-' low the level of the horizontal parts 56, M of said disk gang frame. It will be apparent that when the wings '14 are made of sufiicient width they will underlie the cooperating main frame member regardless of the angle of adjustment or the setting of the disk gangs and that any tendency of the disk gang frame to tilt vertically is effectively withstood by the wings M.

A further alternative embodiment of the invention is illustrated in Fig. 4, wherein the parts bear the same reference numerals as are used in Figs. 1 to 3. In this embodiment the disk gang frames are pivoted at their outer ends to the mainframe members I 6, as in the preferred embodiment, and underlie and engage the intermediate frame members I8 at their inner ends, a

but are not secured thereto as in the preferred form. Instead, a double-acting elongated screw 80 is journaled at one end in a suitable bearing 82 carried by oneof the transverse frame members of the main frame here shown as the front frame member I2, which front frame member is slotted at 84 to permit said bearing 82 to assume any selected position along the length of the slot 84. The inner ends of the disk gang frame members 56 have blocks 86 swivelly connected thereto at 8B and preferably extending in depending relation to the disk gang frame part 56. These blocks have transverse screw-threaded portions therein adapted for threaded connection with oppositely threaded end portions of the screwthreaded shaft 88. It will be apparent that when the shaft 88 of this construction is rotated in one direction, the angular position of the axes of the two disk gang shafts with respect to' the direction-of pull or draft of the implement will be simultaneously adjusted in a complementary manner, that is, as the angular relation of the axis of the front disk gang with respect to the perpendicular of the line of draft increases incident to rearward shifting of the inner end of the front disk frame, the inner end of the rear disk frame will simultaneously be drawn for wardly as will be obvious. It will be apparent that the shaft 80, in addition to its function of adjusting the angular setting of the disk gangs, serves the additional function of stabilizing the inner ends of the disk gangs and retarding vertical tilting thereof. It is desirable in this modified embodiment to provide the inner ends of the disk, and along frames which are subject to adjustment by the shaft 80, with some means for holding them in proper relation to the main frame to permit the main frame to bear the weight thereof when the harrow is lifted bodily from the ground, and for this purpose cable means, chains or stirrups may be provided which are anchored to the main frame and pass under the part 5'6 of the disk gang frame to support the inner end of each disk gang.

While the form of the invention herein described and illustrated is preferred, it will be understood that changes may be made therein within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. A disc harrow comprising a rigid horizontal main frame including front and rear frame members and opposite side and intermediate members secured to said front and rear members and having apertures therein arranged ina plurality of sets extending at diiferent angles transversely of the frame, a plurality of disc gangs each including an elongated rigid sub-frame projecting above and journaling a disc blade shaft, means cooperating with selected sets of frame apertures for securing said sub-frames to and in engagement with the side and intermediate members of said main frame spaced above said shaft and in selected working position, a superstructure carried by the front central portion of said main frame. and at least three spaced connector elements. at

least one connector element being carried by said superstructure, and means for holding said sub-frame in selected upright position with said shafts positioned substantially directly below the members securing said sub-frame to said main frame, said last named means including a part carried by one frame and engaging'the other frame at a point spaced from a securing means.

2. A disc harrow comprising a rigid horizontal main frame including a plurality of longitudinal and transverse rigid members, an upwardly pro- I jecting superstructure secured to the front central portion of said frame, a plurality of connectors carried by said frame and superstructure with said longitudinal members of said main frame at longitudinally spaced points of said sub-frame spaced above said shaft and in a selected one of a plurality of angular positions,

' and means cooperatingwithsaid main frame and sub-frame for limiting vertical tilting ofv said sub-frames including a part carried by one of said frame and engaging the other frame spaced from said securing means.

3. A disc harrow comprising a rigid horizontal main frame including an upwardly projecting superstructure at the front central portion of said frame, a pluralityof connectors carried by 1 said frame and superstructure in vertically and laterally spaced relation, a plurality of disc gangs each including'a shaft and a plurality of spaced disc blades, an elongated rigid sub-frame of inverted U-shape having depending legs journaling each disc gang shaft and an intermediate portion extending substantially horizontally above said disc blades, means for securing the intermediate portion of each sub-frame to and in engagement with said main frame in vertically spaced relation above said shaft and in a selected one of a plurality of angular positions, and rigid bracing means carried by said frame and having a portion engaging at least the outer leg portion of each sub-frame spaced below said main frame and said securing means and accommodating rotation of said leg about its axis.

. JABEZ A. LOVE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 914,921 Bukacek et al Mar. 9, 1909 977,099 King Nov. 19, 1910 1,036,652 Lathrop Aug. 27, 1912 1,070,014 Christianson Aug. 12, 1913 1,245,295 Willis Nov. 6, 1917 1,247,017 Sharp Nov. 20, 1917 1,248,706 Porteous Dec. 4, 1917 2,152,347 Ferraro Mar. 28, 1939 2,320,624 Love June 1, 1943 2,336,848 Cruse Dec. 14, 1943 2,450,236

Hoffman Sept. 28, 1948 

